Maybe they can celebrate Kwaanza every day in their new Wananda. It will all unicorns and rainbows.
In the real world people work to create wealth...in the fictional world of Wakanda the wealth sits under the county...
https://www.vulture.com/2018/02/black-panthers-wakanda-explained.html
Fundamental to Wakanda’s self-sufficiency is its supply of vibranium, which nearly every character in Black Panther helpfully explains is “the strongest metal in the world.” Wakanda is the only country on Earth that has it, thanks to a vibranium-filled meteor that crashed into its lands thousands of years ago. You don’t need to know too much about the science of it except that vibranium is able to absorb kinetic energy and release it later, and the near-inexhaustible supply of it has made Wakanda the most technologically advanced nation on Earth. (